Sir Keir Starmer promised during his leadership campaign that he would stand with striking workers in leaked footage that has provoked a new row with the Left.
The Labour leader joined members of the University and College Union (UCU) on the picket line on February 26, 2020, two days after online voting opened for party members.
Sir Keir has banned his frontbench from appearing on the picket line during recent industrial action, putting him on a collision course with the Left of his party amid a series of walkouts by the RMT railway union and other groups.
Last month he sacked Sam Tarry, a shadow transport minister, for giving unauthorised media interviews in support of rail strikes and flouting collective responsibility in the shadow cabinet by deviating from the party line.
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